Emery-wheel dresser.



W. D. REARWIN. EMERY WHEEL DRESSEE. APPLICATION FILED MAR. 27, 1908.

961,460 Patented June 14,1910.

INV ENTDF! WW-N55555: v J} @NITED rSTATE PATENT FFIQE.

WILBER D. REARWIN, OF CHICAGO, ILLINOIS, ASSIGNOR TO FRANK W. MOSER, OFCHICAGO, ILLINOIS.

EMERY-WHEEL DRESSER.

Application filed March 27, 1908.

To all whom it may concern:

Be it known that I, WVILBER D. REARWIN, a citizen of the United States,residing at Chicago, in the county of Cook and State of Illinois, haveinvented certain new and useful Improvements in Emery-Wheel Dressers, ofwhich the following is a specification.

My invention relates to tools used for dressing and truing abradingwheels and refers particularly to tools designed for truing emery orother wheels of similar density. The devices ordinarily employed forthis purpose are composed of a plurality of disks mounted to rotate upona spindle supported in a handle by which the tool is manipulated, andthe improvements which form the subject matter of this a plication aredirected to devices of this 0 ass.

The chief objects of my invention are to provide a tool of the characterstated made up of separate parts or units, each complete in itself butcapable of being conjoined so as to act as a single tool or element; tofurnish means for properly spacing said units when so conjoined in orderto produce the required results when in actual use; to supply means forinterlocking the individual units in order to combine the separate partsinto a working member; and to construct the separate operating parts insuch a manner that they will be mutually interchangeable, and may beeconomically manufactured.

I accomplish the above results by means of the devices illustrated inthe accompanying drawing forming a part of this application, and inwhich Figure 1 is an assembled view showing an assemblage of three unitsmounted in working form upon a spindle; Fig. 2 is a side elevation ofthe assemblage shown in Fig. 1; Fig. 3 is a side elevation of two disksand a spacer, the spindle being removed; Figs. 4 and 5 are side and edgeelevations, respectively, of a single unit cutter, and Fig. 6 is aperspective view of one of the spacers.

Referring to the details of the drawing, the numeral 10 indicates aspindle upon which are mounted a plurality of cutters 11, separated byspacers 12, and having washers 13 placed upon the spindle in an positionwith the outside cutters. The spindle 10 is adapted to be mounted in ahandle, the latter not being shown as it forms no part of my inSpecification of Letters Patent.

Patented June 1a, 1910.

Serial No. 423,630.

vention, and the separable cutters 11 may be considered as unitsconjoined in the manner shown, and hereinafter more specificallydescribed, to form a working integer.

Each unit cutter 11 is constructed of a single disk of sheet steel,blanked out to a suitable size, and prepared for shaping by a series ofspaced radial cuts or slits 1a extending from the periphery toward thecenter, leaving the central portion of the disk 15 plane and blank withthe exception of a central round aperture 16 t c-accommodate the spindle10. The tongues 17 formed by the slits 14 are then each given atorsional bend or twist upon the median radial line of the tongue sothat the peripheral margin 18 assumes an angle with the plane of theplane portion 15, as shown in Figs. 1 and 5. These parts 18 form cuttingelements or teeth and are wider than the attached base 19 of each tongueso that they will overhang the plane center 15 upon either side. Thetwisting of the tongues 17 to an annular transverse position, produces aconsiderable interval 20 between the adjacent tongues, and as the saidtongues are regularly spaced, when two of the disks are placed withtheir sides in apposition, the lateral overhang of the teeth of eachdisk or unit will be received in the intervals 20 of the adjacent units,thus forming a regular intermeshing of the teeth 18 as shown in Fig. 1.In order to facilitate the proper spacing of the intermeshing teethperipherally, I provide spacing members in the form of disks 21, ofsuitable thickness and furnished with central holes 22, to fit thespindle 10. The periphery of the disks 21 are supplied with teeth 23,spaced to correspond with the tongues 17 but fewer in number, whichshould be an aliquot part of the number of tongues on a cutter. WVhenthe cutters 11 are assembled upon the spindle 10 a single spacer 21 isplaced between each two adjacent cutters, and the teeth 23 are ofsufficient length to extend between the overhang ing portions of thecurved tongues near their attachment to the plane portion 15 of thecutters, as shown in Fig. 8, each tooth 23 being lodged between themargin 24: of one tongue, upon one side and the convex surface 25 of theadjacent tongue upon the other side, so that when a number of thecutters and spacers are assembled as shown in Fig. 1, and properlyconfined against lateral movement the interlocking arrangement thus thatthe peripheral margins of the tongues forming the teeth 18 overlaplaterally, as previously explained, so that the entire working surfaceof the tool is completely covered thereby, thus increasing theefficiency of the device by producing a uniformity of out not attainableby disks of the ordinary construction simply brought into lateralcontact upon the spindle.

The spacers 21 may be used upon the outside of the grouped cutters, butI prefer to use the previously mentioned washers 13 of ordinary shape inthis location.

Having thus described my invention, what I claim, is 1-- 1. In adressing tool, a plurality of cutting members, each consisting of a diskof sheetmetal having twisted radial teeth and said disks so arrangedthat the teeth of one are staggered with the teeth of the next adjacentdisk substantially as shown, and means for holding said disk inoperative arrangement.

2. In a dressing tool, a plurality of rotatable cutting disks havingradial integral teeth arranged so that the plane of the cutting edges ofthe teeth of one disk intersect with the plane of the cutting edges ofthe adjacent disk to form a continuous cutting surface across theassembled disks.

3. In a dressing tool, a plurality of rotatably mounted disks, each diskhaving radial teeth, and each tooth twisted on its axis, and meansarranged between said disks and adapted to engage said teeth, to preventindependent rotation of the respective disks.

4. In a dressing tool, a plurality of rotatably mounted disks, each diskhaving radial teeth and each tooth twisted on its axis,

and means for preventing independent to tation of said disks, said meansconsisting of washers having portions engaging said teeth. 7

5. In a dressing tool, a plurality of rotatably mounted sheet steeldisks cut and bent to form radial teeth having their cutting edgesextending transversely of the plane of the disk, and washers arrangedbetween said disks and having radial teeth interlocking with some of theteeth of the cutting disks.

In testimony whereof I affix my signature in the presence of twowitnesses.

W'ILBER D. REARWIN.

lVitnesses F. BENJAMIN, WM. B. MOORE.

